Plug-gage.



E. GAIRNG.

PLUG GAGE. AP'PLICATION FILED MAYSI i918.

1,298,197. Patented Mar. 25,1919.

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UNITED sTATEs raTENT oEEioE.

EMIL'GAIRING, 0F DETROIT, MICHIGAN, ASSIGNOR TO THE GAIRING-NEEDHAJVITOOL V CO.,INC., 'A CORPORATION 0F MICHIGAN.

PLUG-GAGE.

Application filed May 31, 1918.

To all whom t may concern:

Be it known that I, EMIL GAIRING, citizen of the United States, residingat Detroit, county of Vayne, State of Michigan, have invented a certainnew and useful Improvement in Plug-Gages, and declare the following tobea full, clear, and exact description of the same, suehas will enableothers skilled in the art to which it -pertains to make and use thesame, reference being had to the accompanying drawings, which form apart -of this specification.

This invention relates to plug gages, shown in the accompanying drawingsand more particularly pointed out in the following specification andclaims.

It is well known among those who employ plug gages to determine theaccuracy of their work that the gages rapidly become worn through usemaking it frequently necessary to discard the gages that they may bereplaced by others. This item in some machine shops involves aconsiderable outlay and it is therefore one of the objects of thisinvention to reduce the cost by providing plugs of varying diameters,with a suitable holder which is adapted to receive any of the dierentgages or plugs, the construction of the holder being such that one plugmay be readily removed to be replaced byanother plug of the requiredsize.

.It will be seen that a great variety of sizes of plugs may thus becarried, each of which may be mounted inthe vholder when required foruse and when worn may be replaced by another ,of the lproper gage at anominal cost.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of partsand in the details of construction hereinafterdescribed and claimed, it being understood that changes may be made inthe precise embodiment of the invention herein disclosed withoutdeparting from the spirit of the same.

In the drawings accompanying this specication.

Figure 1 is a side elevation of the device with a plug in position.

Fig. 2 is a longitudinal central sectional view through the holder withthe plug 1u position.

Fig. 3 is an elevation with parts 1n sec- Specification of LettersPatent.

Patented Ma1'.125,11919.

Serial No. 237,616.

tion, showing an annular plug of relatively large diameter mounted uponthe outer peripheral tapering end of the holder.

Fig. 4 is a detail cross sectionalview of an annularplug.

Fig. 5 is a detail view in elevation ofa plug adapted `to enterthe-tapering socket of the holder.

Referring now to the letters of reference placed upon the drawings.

A, denotes a plug holder lprovided with a knurledlhandle tofacilitatethe manual holding of the device. The holderisprovided with atapering socket '-A, at one end adapted to receive the tapering shank B,of a Vplug gage B. The outer peripheral wall near the end of the holderis also of tapering forni tovreceive an annular plug gage C, held inplace by a nutlD, threaded upon the end of the holder. While in somecases it may not be necessary to employ the nut to secure the vannularplug to -the holder this is considered the preferable construction forthe reason that the annular plug gage,-being of relatively largedia.1net.er,-is more apt to stick when withdrawing the gage from thehole in which it is inserted than the smaller sizes of plugs and therebybecome separated from the holder.

Extending centrally through the holder is a bore A2, opening into thetapering socket at 011e end. This bore is relatively larger at theopposite end of the holder for a portion of its length andv therebyforms a shoulder A3. 'E, indicates a plunger roel fitted in the boreAZ,one end offwhich is adapted to bear against Vthe shank end of the gageplug B. E, is an enlargedhead formedY on the opposite end ofv theplunger rod fitted tothe enlarged portion ofthe bore 1n the holder andextending beyond the end of the latter-for a short distance when in itsnormal position. F, denotes a spring coiled around the plunger rod, oneend of which bears against the enlarged head of the rod and the otheragainst the shoulder A3, of the holder. E2, indicates a transverse pinscrewed into the plunger rod and projecting laterally into a radial holeA, formed in the holder to receive it. A5, is a longitudinal grooveextending from the hole A4, into the tapering socket A', to receive thepin E2, when the plunger is actuated to drive out the plug gage.

Having indicated the several parts by reference letters the constructionand operation of the device Will be understood.

Plugs of varying gage formed with a tapering shank are inserted in thetapering socket of the holder, and When it is desired to remove the plugfor the purpose of inserting one of different gage it is only necessaryto tap the projecting head of the plunger upon a table or like surfaceto drive the plug out of the socket of thel holder ,-the spring actingto force the head of the plunger beyond the end of the holder after eachoperation of the plunger.

Relatively large annular gage plugs are tted over the tapering end ofthe holder and are held in place by the nut engaging its threaded end.

f Then it is desired to remove or replace these gage plugs the nut isiirst removed and the projecting Wall ofthe plug tapped lightly to forceit from the tapering endof the holder.

Having thus described the invention what I claim is 1. In a device ofthe characterrlescribed, a holder having at one end a tapering socket, aremovable plug gage having a shank tted to the tapering socket of theholder, and manually actuated means adapted to act upon the plug gage,whereby the latter may be forcibly ejected from the holder.

2. In a device of the character described,

a holder having at one end a tapering socket and a bore communicatingWith the socket extending the length of the holder, arremovable gageplug having a shank fitted to the tapering'l socket of the holder, and aplunger lodged in the bore of the holder, adapted to be manually forcedinto the tapering socket to eject the gage plug Vfrom the holder.V

3. In a device of the character described, a holder having at one end atapering socket and a bore communicating With the socketv extending thelength of the holder, a removable gage plug having a taperingshankffitted to the socket of the holder, a

movable plunger lodged in the bore of the holder and adapted to act uponthe shank Copies of this patent maybecbtained for of the gage plug toeje-ct the latter from the Y holder, and a spring to return the plungerto its initial position following the dis-V charge of the gage plug fromthe holder.

4. In a device of the character described,

a holder having a tapering end to receive an annular gage plug, also atapering socket Y l Vto receive the shank of another'gage plug,

and a central longitudinal bore communicatmg with the socket to receivea movable plunger rod, a removable annular gageY plug fitted to thetapering end of theholder, a

'nut screwed Vto the holder tok securethe annular gage plug in position,a removable gage plug of relativelyy different diameter having atapering shank fitted to the-tapering socket of the holder, amovableplunger Y throughout the length of the holder, an annicating withthe. socket and extending,

nular gage plug fitted to the tapering end of Y the holder, a nutscrewed to the holder to secure' the annular gage plug thereto, a gage Yplug of relatively different diameter having Y a shank fitted to thetapering socket of the holder, a movable plunger lodged `in the centralbore of the holder and adapted to enter its tapering socket having anenlarged hea-d projecting beyond the end of the holder, a

Vspring coiled around the plunger and bearing at one end against theholder `and at'the .Y other end against ,theI enlarged end of,r theplunger, and a .transverse pin supported byv the plunger and extendinginto a radial opening lin Athe Wall of the holder to limit the returnmovement of the plunger.

In testimony whereof, I sign thisspecifii i i l cation in the presenceof two Witnesses.

EMILGAIRING. Witnesses: p v

S. E. THOMAS,

J oiiN CoNsiDiNn, J r.

ve cents cach, by addressing1 the Commissioner of Patents, Washington,D. C.

